Pre-IB Chemistry Unit 5 Vocab

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Across
  1. 5. When two elements combine, it forms a ______
  2. 6. When this type of element is not in a compound, it is paired up with the same element as itself
  3. 7. What combines/reacts in the chemical reaction, on the left side of the equation.
  4. 9. When an atom gains or loses an electron, it is considered a(n) ____
  5. 11. To balance a reaction, a _____ is written in front of the chemical equation.
  6. 13. This is a type of compound that is between two or more non-metals, has a low melting point, and shares its valence electrons.
  7. 14. Replacement When one element switches places with another, follows the pattern A + BC —> B + AC
Down
  1. 1. When a reactant breaks down into simpler products, follows the pattern AB —> A + B
  2. 2. These are the small numbers that are after the element it’s combined to within a chemical equation, they can’t be changed.
  3. 3. What comes out of the chemical reaction, on the right side of the equation
  4. 4. When two or more elements combine together, follows the pattern A+B —> AB
  5. 8. A chemical reaction that releases heat, carbon dioxide, and water. Usually an explosive reaction.
  6. 10. Replacement When two reactants trade elements, follows the pattern AB + CD —> AD + CB
  7. 12. This is a type of compound that is between a metal and a non-metal, has a high melting point, and transfers its valence electrons.